@SuppressWarnings("unchecked")
public static void alertException(
String pipelineName,
String revision,
MetricRegistry metrics,
Object value,
RuleDefinition ruleDefinition) {
final Map<String, Object> alertResponse = new HashMap<>();
alertResponse.put(EmailConstants.EXCEPTION_MESSAGE, value);
Gauge<Object> gauge =
MetricsConfigurator.getGauge(metrics, AlertsUtil.getAlertGaugeName(ruleDefinition.getId()));
if (gauge != null) {
// remove existing gauge
MetricsConfigurator.removeGauge(
metrics, AlertsUtil.getAlertGaugeName(ruleDefinition.getId()), pipelineName, revision);
}
Gauge<Object> alertResponseGauge =
new Gauge<Object>() {
@Override
public Object getValue() {
return alertResponse;
}
};
MetricsConfigurator.createGauge(
metrics,
AlertsUtil.getAlertGaugeName(ruleDefinition.getId()),
alertResponseGauge,
pipelineName,
revision);
}
public static Gauge<Object> createAlertResponseGauge(
String pipelineName,
String revision,
MetricRegistry metrics,
Object value,
RuleDefinition ruleDefinition) {
final Map<String, Object> alertResponse = new HashMap<>();
alertResponse.put(EmailConstants.CURRENT_VALUE, value);
Gauge<Object> alertResponseGauge =
new Gauge<Object>() {
@Override
public Object getValue() {
return alertResponse;
}
};
alertResponse.put(EmailConstants.TIMESTAMP, System.currentTimeMillis());
List<String> alertTexts = new ArrayList<>();
alertTexts.add(ruleDefinition.getAlertText());
alertResponse.put(EmailConstants.ALERT_TEXTS, alertTexts);
MetricsConfigurator.createGauge(
metrics,
AlertsUtil.getAlertGaugeName(ruleDefinition.getId()),
alertResponseGauge,
pipelineName,
revision);
return alertResponseGauge;
}
private static void updateAlertText(RuleDefinition ruleDefinition, List<String> alertTexts) {
// As of today Data and Metric Rules have the same fixed alert texts for a given rule.
// But Drift rules can have different alert texts based on the drift in the values.
// The check below will avoid collecting the same alert texts again and again in case of metric
// and data rules.
// One may ask why not just add alert texts the first time for metric and data rules and skip
// updating it?
// Because when we add EL support in alert texts then metric and data rules may produce
// different alert texts.
int size = alertTexts.size();
String alertText = ruleDefinition.getAlertText();
if (size > 0) {
String lastAlertText = alertTexts.get(size - 1);
if (!lastAlertText.equals(alertText)) {
alertTexts.add(alertText);
if (alertTexts.size() > 10) {
alertTexts.remove(0);
}
}
} else {
// add
alertTexts.add(alertText);
if (alertTexts.size() > 10) {
alertTexts.remove(0);
}
}
}